(See Property Tax Statistics, Sales Ratio and Equalization Tables.) Counties with 50,000 or less inhabitants: Three year average of the median level of assessment – not more than 35.33% and not less than 31.33% of fair cash value of property within the assessment jurisdiction. Applications: 144-148. Even with that reversal, property tax uniformity has tended to improve over the last 32 years. Fundamental to the administration of the property tax is the concept that all property should be appraised and assessed on a uniform basis. The COD should be 0=< on improved residential property and 0=<20% on all other classes. Gastwirth (1982), "Statistical properties as a measure of tax assessment uniformity", Journal of Statistical Planning Inference, Vol. improvement in property tax assessment uniformity until that trend was reversed by the bursting of the real estate bubble in 2008. that result by the number of ratios. Property Tax Fiduciary 1.11. The Kansas Constitution requires that all taxable A coefficient of dispersion (COD) not greater than 15.00%. The two main reasons why Appraisal districts need to consistently assess all property at 100% of market value. 48, pp. Nineteen counties have coefficients of dispersion for residential properties greater than 15 percent. The IAAO Standard suggests that residential properties have a coefficient of dispersion less than 15 percent. The Kansas Constitution requires that all taxable Please review the necessary reporting forms and step-by-step instructions of the reappraisal process. Under Berrios, the average coefficient of dispersion for first-pass valuations of commercial and industrial properties during the study period was 98, nearly five times the standard of 20. Fourteen counties meet this standard. and the coefficient of dispersion (COD) which is used in setting the education tax rates. Washington Department of Revenue Property Tax Division Annual Valuation Team (360) 534-1362 10/02/12 4 The coefficient of dispersion (COD) is the most used measure of uniformity in ratio studies, and the only other one we will be discussing today. What Is a Reappraisal? Coefficient of Dispersion - The relative dispersion or variability of assessments from the median. For improved residential property, it should be 0=<15%. Acceptable coefficients of dispersion depend on property type but should typically be 20% or less. 6, pp. The variance is 1-12. The IAAO suggested coefficient of dispersion for nonresidential property is 20 percent or less. Reference: Bonett and Seier (2005), "Confidence interval for a coefficient of dispersion in nonnormal distributions", Biometrical Journal, Vol. The Illinois Equity - Is measured by the coefficient of dispersion (COD). 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